REV. A

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a

ADP3610

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1999

320 mA Switched Capacitor

Voltage Doubler

FEATURES

Push-Pull Charge Pump Doubler Reduces Output Ripple

+3.0 V to +3.6 V Operation

Shutdown Capability

Operating Temperature Range: –20 C to +85 C

Thermally Enhanced 16-Lead TSSOP Package

APPLICATIONS

High Current Doublers

LCD Panels

Cellular Phones

Inductorless Boost Converters

GENERAL DESCRIPTION

The ADP3610 is a push-pull switched-capacitor converter volt-

age doubler. The term “push-pull” refers to two charge pumps

working in parallel and in opposing phase to deliver charge to

support the output voltage. When one capacitor is pumping

charge to the output, the other is recharging. This technique

minimizes voltage loss and output voltage ripple.

The converter accommodates input voltages from +3 V to

+3.6 V and can provide 320 mA using 2.2

µF MLCC pump

capacitors. Converter operation can be enabled or disabled

simply by an input signal. The package is enhanced with Analog

Devices’ proprietary Thermal Coastline feature, which allows

up to 980 mW of power dissipation at room temperature. The

exceptionally thin TSSOP-16 package and the requirement of

only capacitors (no inductors) to support the converter opera-

tion allows slim designs, e.g., for TFT or LCD display panels.

1 F

CP2

2.2 F

CP1

2.2 F

SD

GND

ADP3610

1 F

Figure 1. Typical Application Circuit

FUNCTIONAL BLOCK DIAGRAM

1MHz

OSC

OVER-

VOLTAGE

PROTECTION

SD

GND

CM2

CP2

CM1

CP1

DRV

DRIVE LOGIC

DRV

ADP3610